Rai Benjamin Shocked by Hurdle Record, 2nd Place to Karsten Warholm
Women's 400m World Record is 48.25 – Žiga P. Škraba
Karsten Warholm smashes 400m hurdles world record in one of greatest races in history | Tokyo Olympic Games 2020 | The Guardian
The 400 Meter WORLD RECORD || WAYDE VAN NIEKERK'S Plan for 2021 - YouTube
Dutch runner Bol breaks 400m indoor world record
Dutch runner Femke Bol breaks own 400m indoor world record
400 Metres
Van Niekerk smashes world record to grab Olympic 400m glory - Olympic News
43.03 – The Fastest 400m in History – Žiga P. Škraba
Karsten Warholm smashes 400m hurdles world record, wins gold in Tokyo - Canadian Running Magazine
Mohammad Anas smashes 400m national record to qualify for World Championships | More sports News - Times of India
Tokyo Olympics Daily: Karsten Warholm wins greatest ever men's 400m hurdles
Athletics-Dutch runner Bol smashes her own indoor 400m world record | SaltWire
Sydney McLaughlin breaks her own 400-meter hurdles world record | CNN
400 Metres
Michael Johnson Sevilla 1999: Men's 400m world record - YouTube
/cdn.vox-cdn.com/uploads/chorus_image/image/50388485/Screen_Shot_2016-08-14_at_9.02.30_PM.0.0.png "Olympics 2016 results: Wayde van Niekerk sets world record from lane 8 in men's 400m run - SBNation.com")
Olympics 2016 results: Wayde van Niekerk sets world record from lane 8 in men's 400m run - SBNation.com
South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
400 metres - Wikipedia
